fix app

app.py

@@ -257,11 +257,11 @@ with gr.Blocks(css=css) as demo:
         )
 
         prompt_in = gr.Textbox(label="Prompt", placeholder="A chihuahua in astronaut suit floating in space, cinematic lighting, glow effect", elem_id="prompt-in")
-        output_size = gr.Radio(["576x1024", "256x256"], label="Output Size", info="576x1024 is watermark-free"),
+        output_size = gr.Radio(choices=["576x1024", "256x256"], value="576x1024", label="Output Size", info="576x1024 is watermark-free"),
         submit_btn = gr.Button("Generate")
         video_result = gr.Video(label="Video Output", elem_id="video-output")
 
-        gr.Examples(examples=examples, inputs=[prompt_in])
+        gr.Examples(examples=examples, inputs=[prompt_in, output_size])
 
     submit_btn.click(fn=infer,
             inputs=[prompt_in, output_size],